5551281 has 8 divisors (see below), whose sum is σ = 8224160. Its totient is φ = 3700836.

The previous prime is 5551279. The next prime is 5551283. The reversal of 5551281 is 1821555.

It is an interprime number because it is at equal distance from previous prime (5551279) and next prime (5551283).

It is not a de Polignac number, because 5551281 - 2¹ = 5551279 is a prime.

It is a super-2 number, since 2×5551281² = 61633441481922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 205603 = 5551281 / (5 + 5 + 5 + 1 + 2 + 8 + 1).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102775 + ... + 102828.

It is an arithmetic number, because the mean of its divisors is an integer number (1028020).

Almost surely, 2^5551281 is an apocalyptic number.

It is an amenable number.

5551281 is a deficient number, since it is larger than the sum of its proper divisors (2672879).

5551281 is a wasteful number, since it uses less digits than its factorization.

5551281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205612 (or 205606 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 5551281 is about 2356.1156593003. The cubic root of 5551281 is about 177.0643259445.

It can be divided in two parts, 5551 and 281, that added together give a cube (5832 = 18³).

The spelling of 5551281 in words is "five million, five hundred fifty-one thousand, two hundred eighty-one".